Logging java errors to a text file, please help.

Could someone please advise how to log java errors to a text file?
I know from Window you can do to "ANY COMMAND > C:\log.txt and the output will send to the log.txt text file.
However, how do you log errors when you run java filename? Wish I could just copy and paste from my Window command prompt screen.
I am just trying to post the errors I receive to the forum.
Thanks,

user_s8721301 wrote:
..Wish I could just copy and paste from my Window command prompt screen.(from memory) Drag the mouse diagonally across the text in the DOS prompt, then hit 'enter'. The selected text should be on the clipboard, ready to paste.

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